Klean Kanteen Classic Flip Seal Sport Cap

The 100% leakproof Flip Seal Sport Cap comes with an ergonomic spout that opens and closes with just a flick of the thumb and can be used with or without the included stainless steel straw for maximum versatility so you can stay hydrated your way. Includes special telescoping straw to fit various size bottles. NOTE: Compatible with Classic narrow mouth bottles only (with internal threads). Recommended for kids ages 3+.